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Peterpan12
Germany
2 Posts |
 Posted - 11/11/2015 : 06:30:20 AM
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Origin Ver.8.5 and Service Release (Select Help-->About Origin):
Operating System:Windows 7
Hi,
I have three columns of experimental data (A,B,C). C is the linear combination of A and B (A*m+B*n=C). So every line should be A1*m+B1*n=C1, A2*m+B2*n=C2, A3*m+B3*n=C3......I would like to fit this Data to get m and n. How can I do this?
Kind regards,
Peterpan12 |
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Hideo Fujii
USA
1582 Posts |
Posted - 11/11/2015 : 10:07:49 AM
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Hi Peterpan12,
This is what the multiple linear regression does. ("Analysis: Fitting: Multiple Linear Regression" menu)
In your case, as there is no bias constant, you can set the intercept fixed to 0 from the Fit Control option branch.
See the document at:
http://www.originlab.com/doc/Origin-Help/Multi-Regression-Dialog
--Hideo Fujii
OriginLab |
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Peterpan12
Germany
2 Posts |
Posted - 11/11/2015 : 10:59:47 AM
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| Thank you Hideo Fuji, you made my day! |
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lasec2016
1 Posts |
Posted - 05/12/2016 : 6:15:16 PM
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Hi Hideo Fujii.
I apologise but I don't understand your suggestion.
I've got the same problem of Peterpan12.
I have three columns (A,B,C) where C is the linear combination of A and B.
Using the expression of the multilinear regression:
y = β0 + β1x1 + β2x2
where y = col(C), x1 = col(A), x2 = col(B)
A and B are the independent columns while C is the dependent one.
Unfortunately, Multiple Linear Regression Dialog Box don't allow to select two columns as independent.
Currently, I'm using Origin8. I have used for more than 10 year Origin6 and with the old version I had not problems.
Could you help me?
Thank you in advance,
Andrea
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Linear combination of two datasets to fit one